Daystar Technology announced the immediate availability of 1.92GHz and 2.0GHz processor upgrades for the Aluminum PowerBook G4 series on Wednesday. The XLR8 MAChSpeed G4 Aluminum upgrade service includes a box for shipping, factory installation and testing, and return shipping of your PowerBook. The service is available for 15 and 17-inch PowerBooks with original processor speeds ranging from 1.0GHz up to 1.5GHz, and is priced starting at US$499.